OP's Comment:
Quote:
i have hosted this service in my local and its working properly.when i run this service in my browser by putting querystring value hard coded then it is giving me reply but when i call this function from my cross domain web page it gives me error...
According to your comments you cannot test your WCF service that way.If you need to test it from cross domain then you have to host your service on Public IIS server.It won't work with the localhost the way you tried (i.e. url: "http://localhost:82/BookingRequest.svc/AutoSuggestBookPanel?prefixText=Australia&ReturnType=json", ).
So host your service on public IIS server and check after that by replacing that host url on above js method.